# Math 123 quantitative reasoning homework answers section 3

### Question:

How do you find a number’s square root?

### Answer:

If you multiply the square root of a number by itself, you get the original number back. In mathematical terms, taking the square root of a number is analogous to doing the reverse of multiplying it by four. The square of an integer can be calculated by multiplying it by itself. When you multiply a number by itself four times, you get back the original number; this is the square root of the number. If “a” is the square root of “b,” then “a” times itself equals “b.” Each number has two square roots, one positive and one negative, because the square of any number is always positive.